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Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 5241026924

Certificate GIA 5241026924

Diamond specifications and retailer prices

From $11,925 AUD
$8,357 USD
As of November 1, 2026
Save $9,945 AUD (45%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $21,870 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5241026924. Listed at 21 retailers as of October 30, 2026, with prices from $11,925 to $21,870, a $9,945 spread on the same certified stone. NZ Jewellers lists it at $21,870. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5241026924
Dimensions7.28 × 7.32 × 4.56 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
7.28 mm7.32 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5241026924
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $21,870 AUD|Low: $12,029 AUD|High: $21,870 AUD|Avg: $16,344 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 7$12,029 AUD
Retailer 8$12,620 AUD
Retailer 2$14,138 AUD
Retailer 6$14,428 AUD
Retailer 9$14,435 AUD
Retailer 10$14,600 AUD
Retailer 3$15,697 AUD
Retailer 5$19,277 AUD
Retailer 4$20,494 AUD
NZ Jewellers$21,870 AUD

43 data points across 10 retailers

21 retailers$11,925 AUD to $21,870 AUD

A
Cheapest Retailer
-
$11,925 AUD
$8,357 USD
A
Retailer 2
-
$12,029 AUD
$8,430 USD
View
B+
Retailer 3
-
$12,620 AUD
$8,844 USD
View
Final sale: no returns
B+
Retailer 4
-
$12,670 AUD
$8,880 USD
View
B+
Retailer 5
-
$12,719 AUD
CA$12,380 CAD
View
B+
Retailer 6
-
$14,138 AUD
£7,802 GBP
View
B+
Retailer 7
-
$14,215 AUD
$9,962 USD
View
Retailer 8
-
$14,428 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
$14,435 AUD
$10,116 USD
View
B+
Retailer 10
-
$14,600 AUD
$10,232 USD
View
B
Retailer 11
-
$15,121 AUD
$10,597 USD
View
B+
Retailer 12
-
$15,453 AUD
$10,830 USD
View
B+
Retailer 13
-
$15,453 AUD
$10,830 USD
View
B+
Retailer 14
-
$15,697 AUD
€10,477 EUR
View
B+
Retailer 15
-
$15,967 AUD
$11,190 USD
View
B+
Retailer 16
-
$16,402 AUD
$11,495 USD
View
B
Retailer 17
-
$16,790 AUD
$11,767 USD
View
Retailer 18
-
$17,270 AUD
$12,103 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
$19,277 AUD
ZAR 218,251 ZAR
View
B
Retailer 20
-
$20,494 AUD
£11,309 GBP
View
Most Expensive
B
NZ Jewellers
cbbe9cfe-acaf-44be-8157-92f430013637 · Oct 30
$21,870 AUD
$15,327 USD
View
20 more retailers have this diamond
Prices start from $11,925 AUDSave up to $9,945 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Round
$11,925 AUD